English
Русский
Oʼzbek
Subjects
News and articles
About us
Career
Contacts
Profile
Watch history
My library
Notifications
Logout
Русский
Oʼzbek
Online Mektep
Authorization
Home
Subjects
Science
Main
Subjects
Science
Objects. Substance. Phenomena
Objects. Substance. Phenomena
Concept of objects
Substance and property
